<!DOCTYPE html>
<html lang="en">

<head>
<meta charset="UTF-8">
 <meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>Document</title>
<script src="../vue.js"></script>
</head>

<body>
<div id="app">
    <!-- 跳过这个元素和它的子元素的编译过程.跳过大量没有指令的节点会加快编译 -->
    <p v-pre>我是一次性的{{count}}</p>
    <p>{{count}}</p>
    <button @click="count++">累加</button>

 
</div>
<script>

 Vue.config.productionTip = false;


 const vm = new Vue({

el: "#app",

data() {
return {
    count:0,
};
},
 });
 </script>
</body>

</html>